CN101213479A - Gigabit Ethernet longwave optical transceiver module having amplified bias current - Google Patents

Gigabit Ethernet longwave optical transceiver module having amplified bias current Download PDF

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Publication number
CN101213479A
CN101213479A CNA200680023816XA CN200680023816A CN101213479A CN 101213479 A CN101213479 A CN 101213479A CN A200680023816X A CNA200680023816X A CN A200680023816XA CN 200680023816 A CN200680023816 A CN 200680023816A CN 101213479 A CN101213479 A CN 101213479A
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bias current
transceiver module
optical
optical transceiver
amplifier
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菲利普·安托尼·凯利
米尼娅·特尔克利亚
蒂莫西·G·莫兰
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Finisar Corp
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Finisar Corp
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Abstract

An optical transceiver module configured for longwave optical transmission is disclosed. Significantly, the transceiver module utilizes components formerly used only for shortwave optical transmission, thereby reducing new component production and device complexity. In one embodiment, the transceiver module includes a transmitter optical subassembly including a laser capable of producing an optical signal. A consolidated laser driver/post amplifier including a first bias current source provides a bias current to the laser for producing the optical signal. A means for amplifying the bias current provided to the laser by the first bias current source is also included as a separate component from the laser driver/post amplifier. The means for amplifying in one embodiment is a field-effect transistor that is operably connected to the laser driver/post amplifier and configured to provide an additional bias current to the laser diode such that sufficient lasing operation of the laser is realized.

Description

Gigabit Ethernet longwave optical transceiver module with bias current of amplification
Technical field
The present invention generally relates to optical transceiver module.More specifically, the present invention relates to a kind of low cost optical transceiver module that is used for the long wavelength light signal emission with simplified structure and electronic circuit.
Background technology
Optical transceiver is used to transmit and receive from the light signal of optical-fiber network and allows the electric network device to dock with optical-fiber network and pass through optical network communication.Many optical transceivers are modular, and design according to other characteristic of the mechanical aspects, form factor, light and electric demand and the transceiver that define transceiver and the industry standard of demand.For example little form factor module multi-source agreement (" SFF MSA "), little form factor pluggable module multi-source agreement (" SFP MSA ") and the little form factor pluggable module of 10 gigabits multi-source agreement (" XFP MSA ") revised edition 3.1 have defined these standards.
The basic optical device of conventional transceiver comprises light-emitter assembly (transmitter opticalsub-assembly, " TOSA ") and optical receiver assembly (receiver optical sub-assembly, " ROSA ").TOSA receives electric signal from main process equipment via the transceiver module circuit, and produces corresponding light signal, and described light signal is sent to the distant-end node in the optical-fiber network then.On the contrary, ROSA receives light signal and the corresponding electric signal of output that enters, and described electric signal can be used by main process equipment or handle subsequently.In addition, most of transceivers comprise rigid printed circuit boards (PCB), and wherein, this printed circuit board comprises the control circuit that is used for TOSA and ROSA.The post amplifier that this control circuit can comprise laser driver and be used for the data-signal of being handled by TOSA and ROSA is respectively regulated.
Each is connected to optical-fiber network via the optical fiber that can transmit light signal TOSA and ROSA.Each optical fiber comprises the connector that is complementary with the corresponding port that limits in corresponding TOSA or ROSA.
TOSA comprises light source, and such as laser diode, it produces light signal, and this light signal transmits via the optical fiber that is connected to TOSA.Laser instrument can be configured to launch the light signal of one or more wavelength.For example, according to the main wavelength that institute launches and/or receives, transceiver is classified as " shortwave " (" SW ") or " long wave " (" LW ") transceiver usually.The example of the shortwave optical signal wavelengths of being launched by transceiver is 780 or 850nm; Longwave transceivers can be launched for example has 1310 or the light signal of 1550nm wavelength.
Along with the speed that sends data via communication network raises and the cost anxiety of optical communication network, the demand that reduces to make the related cost of light device constantly increases.A kind of mode that can realize this demand is the interchangeability that is used to form the device (such as optical transceiver module) of light device by increase.
Particularly, in long wave and shortwave transceiver, utilize public device, represented attainable potential important economy such as the ability of laser driver and post amplifier.Regrettably, the different interchangeability difficult that make usually of long wave and shortwave transceiver designs, especially for laser driver, it has different electric currents and impedance requirements usually according to the wavelength of the light signal that will launch.
Similarly, also need light device can be configured to make selected device between the distinct device type, to exchange in this area such as optical transceiver module.Particularly, provide change in longwave transceivers, to utilize the ability of selected internal components, make cheaply with the complicacy of minimum that the ability of longwave transceivers will be useful thereby provide such as shortwave laser driver with minimum.
Summary of the invention
At above-mentioned and other needs in this area the present invention has been proposed.In brief, embodiments of the invention relate to optical transceiver module, and this optical transceiver module is arranged to the longwave optical emission.Meaningfully, only be used for the photoemissive device of shortwave before this transceiver module utilization, thereby reduced new unit manufacturing and equipment complexity.
In one embodiment, transceiver module comprises: light-emitter assembly, this assembly comprises the laser instrument that can produce light signal.Laser driver/the post amplifier that comprises the merging of first bias current sources provides bias current to described laser instrument, so that produce light signal.Be used to amplify the device that offers the bias current of laser instrument by first bias current sources, in also being included in as the device that separates with laser driver/post amplifier.
In one embodiment, the device that is used to amplify is a field effect transistor, it can be operated and be used to be connected to laser driver/post amplifier, and the bias current that is configured to provide additional makes the abundant Laser emission operation of laser instrument be achieved to laser diode.In another embodiment, the device that is used to amplify is configured to bipolar transistor.In another embodiment, between laser driver/post amplifier and the device that is used to amplify, buffer amplifier can be set, so that the further auxiliary bias current accepted that is used for laser instrument that produces.
Embodiments of the invention are configured for the long wave of the data transfer rate with at least 1 gigabit/sec, the operation in the SFP type optical transceiver module.However, it should be understood that the transceiver module with various configurations and speed also can use different embodiment principle as described herein acceptably.Particularly, should be understood that optical transceiver module as described herein is low-cost module, it utilizes initial configuration to be used for the laser driver/post amplifier of shortwave transceiver designs.Yet, rely on use here with the additional bias current source of describing, shortwave laser driver/post amplifier is used in the long wave emission in the present transceiver module, thereby increases interchangeability, the needs that reduce complicacy simultaneously and design additional device.
These and further feature of the present invention will more clearly understand from the following description and the appended claims, perhaps can be known by the practice of the present invention that hereinafter will mention.
Description of drawings
For further setting forth above-mentioned and other advantage and feature of the present invention, will be with reference to coming the present invention is more specifically described with the illustrated specific embodiments of the invention of accompanying drawing.Should be understood that these accompanying drawings have only described exemplary embodiments of the present invention, therefore should not think limitation of the scope of the invention.To be described and illustrate supplementary features of the present invention and details by using accompanying drawing, in described accompanying drawing:
Fig. 1 is the skeleton view that comprises the optical transceiver module of one embodiment of the present of invention;
Fig. 2 is the simplified block diagram according to the transceiver of Fig. 1 of the explanation different aspect of the present invention of an embodiment;
Fig. 3 is the synoptic diagram of bias current amplifier of light source of optical transceiver module that is used for being included in Fig. 1 according to an embodiment;
Fig. 4 is the synoptic diagram of bias current amplifier of light source of optical transceiver module that is used for being included in Fig. 1 according to another embodiment;
Fig. 5 is the synoptic diagram of the amplifier that uses together of the bias current amplifier in conjunction with the embodiment of the invention;
Fig. 6 is the simplified block diagram according to the transceiver of Fig. 1 of the explanation different aspect of the present invention of another embodiment.
Embodiment
With reference now to accompanying drawing,, wherein analog structure will be provided with similar reference marker.Should be understood that described accompanying drawing is the n-lustrative of exemplary embodiment of the present invention and schematically shows, is not limitation of the present invention, needn't describe in proportion yet.
Fig. 1-6 has described the different characteristic of the embodiment of the invention, and it generally relates to the optical transceiver module that is arranged to the communication of gigabit (that is 1 gigabit/sec) longwave optical.This transceiver also is configured to realize with simple designs, and described simple designs provides the lower manufacturability of cost than other similar available longwave transceivers.
At first with reference to Fig. 1 and 2, it has schematically described each details that is labeled as 10 optical transceiver module (" transceiver ") generally according to an embodiment.Transceiver 10 is arranged to and transmits and receives light signal, and this light signal is relevant with external host (also not shown), and described external host is connected to the communication network (not shown) in one embodiment.As described, the transceiver 10 shown in Fig. 1 comprises and is arranged on the printed circuit board (" PCB ") 11 or the different components relevant with printed circuit board (" PCB ") 11, comprises being used to allow the connector 12 that docks on transceiver and the main-machine communication.Connector 12 in the present embodiment is " little form factor can plug " (" SFP ") types, and is arranged on the edge of PCB 11, and the connector of other type also can use as an alternative certainly.Comprise on the PCB 11 that non-volatile storage 14 is with the storage related data, such as sign that is used for transceiver 10 and initial settings information.
Transceiver 10 also comprises light-emitter assembly (" TOSA ") 16 and optical receiver assembly (" ROSA ") 18, and it is common to allow by transceiver via optical signal transmitting that comprises data and the reception carried out with optical fiber (not shown) that TOSA is connected with ROSA.And TOSA 16 and ROSA 18 each work upward are connected to PCB 11 by electrical interface 19.Similarly, PCB 11 has made things convenient for the telecommunication between each and the main frame among TOSA 16, the TOSA 18.Above-mentioned transceiver components partly is encapsulated in the housing 25, but this housing combined cover (not shown) is to be defined for the outer cover of transceiver 10.
Notice that embodiments of the invention relate to the transceiver that disposes with simple designs, transmit and receive, the transceiver assembly cost is minimized to allow longwave optical.Note, although it will be gone through, to the description of optical transceiver 10 only as an illustration and not as limitation of the present invention.As mentioned above, transceiver 10 in one embodiment is applicable to the per second optical signal transmitting and the reception of 1Gbit data transfer rate at least, and the data transfer rate among other embodiment also can certainly.In addition, principle of the present invention can have the Any shape factor such as XFP, SFP with SFF and without limits and have in the optical transceiver that is in the one or more different optical wavelength in long wave and the shortwave transmitting boundary and realize.
During operation, transceiver 10 can receive the electric signal from the carrying data of main frame, so that be transmitted on the optical fiber (not shown) as the light signal of carrying data, described main frame can be any computing system that can communicate by letter with transceiver 10.The described electrical data signal that offers transceiver 10 number carries via a pair of differential transmit signal lines 34 shown in Figure 2.Each signal wire of this differential signal line centering carries in two differential electrical data stream that signal polarity only differs from one another.Similarly, described line uses " Tx " and "+" or "-" designator to come mark respectively, thereby indicates each to send the corresponding positive or negative polarity of line.The electricity differential data signals is provided for light source, and such as the laser instrument 28 that is arranged in TOSA 16, for example, laser instrument 28 converts the electrical signal to the light signal of carrying data, transmits so that be transmitted on the optical fiber and via optical communication network.Laser instrument 28 can be edge-emission laser diode (for example, Fabry-Perot, DFB etc.), vertical cavity surface emitting laser (" VCSEL ") or other suitable light source.Correspondingly, TOSA 16 is as electrical optical converter.
Two differential laser bias signal lines 32 and 33 also are included in wherein and are associated with differential transmit signal lines 34, so as to provide bias current to laser instrument 28 so that its work.By " biasing+" (line 32) and " biasing-" (line 33) two differential laser bias signal lines are identified, to indicate it respectively for the polar relationship that sends signal wire 34.In addition, TOSA 16 comprises photoelectric detector (" PD ") 36, and it is used for the power of the light signal that monitoring laser device 28 launched." PD " signal wire 36A can operate and be used for being connected with PD 36.
In addition, transceiver 10 is configured to receive light signal from the carrying data of optical fiber via ROSA 18.ROSA 18 is as light-electric transducer, and it converts the light signal that is received to electric signal via photodiode " PD " 22 or other suitable equipment.The electric signal that obtains carries via a pair of differential received signal line 26.As the situation of differential transmit signal lines 34, each signal wire in the differential received signal line 26 carries in two differential electrical data stream that signal polarity only differs from one another.Similarly, described line represents with " Rx " and "+" or "-" mark respectively, thereby indicates the corresponding negative or positive electrode of each line.
Comprise electron device on the PCB 11 of transceiver 10, so that the transmission of auxiliary data signal and reception.In illustrated embodiment, be used to regulate post amplifier and the laser driver merging that is used for drive laser 28, to form integrated laser driver/post amplifier (" LDPA ") 20 from the electric signal of photodiode 22 receptions.Similarly, LDPA 20 resides on single integrated circuit (IC) chip, and is included on the PCB 11 with other electron device shown in Fig. 2 as a device.The U.S. Patent application No.10/970 that can be called " Integrated Post Amplifier; Laser Driver; and Controller " about the further details of integrated LDPA 20 in the name that on October 21st, 2004 submitted to, find in 529 (" ' 529 application "), its full content is incorporated herein by reference.In other embodiments, post amplifier and laser driver can be used as independent device and are included on the PCB 11.
In more detail, under the situation of TOSA 16, LDPA 20 number is forwarded to TOSA so that before converting light signal to by laser instrument 28 described electrical data signal number is carried out auxiliary adjustment at the electrical data signal that will receive from main frame.As just mentioning, the additional modulation marking current that marking current that laser instrument 28 is provided by bias signal line 32 (" bias current ") and transmission signal wire 34 are provided drives.In one embodiment, LDPA 20 is implemented as the integrated circuit on the PCB, and comprises and different the pins shown in Figure 2 and interconnection of unlike signal line.In other embodiments, LDPA can take other form or have other interconnection configuration.
The transceiver 10 of present embodiment also comprises and being used for offering the device that the bias current of laser instrument 28 amplifies by LDPA 20 via laser bias signal line 32 and 33.In one embodiment, this device LDPA 20 relevant one or more electron devices that can pass through to be disposed and that be used for the bias current amplification provide.Especially, illustrated embodiment has described the device that is used for amplifying laser device bias current, this device comprises bias current amplifier (" BCA ") 40, and described bias current amplifier 40 provides the bias current of q.s to laser instrument 28 with LDPA 20 cooperations during being provided in transceiver operations.Although shown in Figure 2 for being installed on the PCB 11, in other embodiments, BCA 40 can be included on the top of other transceiver components or the other position in the transceiver 10.
Particularly, Fig. 2 shows in the present embodiment, and BCA 40 work goes up that both are connected via the signal wire (being LDCCOMP line 44) of corresponding connecting line 46 and LDPA 20 and negative polarity (-) laser bias signal line 33.As mentioned, in one embodiment, other line among LDCCOMP line 44, laser bias signal line 33 and Fig. 2 is implemented as the conductive traces on the PCB 11, and work go up be included in LDPA 20 on respective pin be connected.
In more detail, negative polarity laser bias signal line 33 is the lines from LDPA 20 output, its with 32 cooperations of positive polarity laser bias signal line to provide bias current by the internal circuit generation of LDPA 20 to laser instrument 28.In fact, BCA 40 is arranged in parallel with laser bias signal line 33, so that amplify the laser bias that outputs to laser instrument 28.LDCCOMP line 44 also is the output line of LDPA20, and with its connecting to capacitor 45 as the bias loop filtrator, the LDPA that the voltage bias that is used for the internal circuit of LDPA 20, this internal circuit are used to produce the bias current that is used for laser instrument 28 provides part or " inside " part.Except this more traditional role, LDCCOMP line 44 also is used to control BCA 40 as external current source in the present embodiment.Therefore, in this configuration, BCA 40 can increase by inner LDPA biasing circuit and offers laser instrument 28, also is controlled by the laser bias current of LDPA internal bias loop control circuit simultaneously.Through so configuration, it is in parallel with the internal bias current source of LDPA 20 that BCA 40 can be considered to, and these two parallel-current sources are all controlled by the bias loop control function of LDCCOMP line 44 simultaneously.
Notice that although illustrate and be connected with negative polarity laser bias signal line 33 in the work above being described as, yet BCA also can be connected to positive polarity laser bias signal line 32 shown in Figure 2 alternatively, so that provide additional bias current to laser instrument.
As mentioned above, comprise in the transceiver 10 that BCA 40 feasible comparing with the laser bias current that can be realized by LDPA 20 separately usually can produce supercharging.Why like this, be because except that BCA 40 and the relevant connecting line 46, the device of the formation transceiver 10 shown in Fig. 1 and 2 is disposed for transmitting and receiving the operation of short wavelength light signal usually, but not the operation that transmits and receives long-wave signal among each embodiment of the present invention.Using the cell configuration of this relevant shortwave is favourable for transmitting and receiving of long wavelength light signal, and reason is that it makes the manufacturing cost minimum by adopt a kind of common design at shortwave operation transceiver and long wave operation transceiver.Similarly, comprise that in being designed for the low-cost transceiver design of short wave communication originally BCA 40 has realized that longwave optical transmits and receives ability, makes the manufacturing cost minimum simultaneously.In addition, as will be appreciated, the dirigibility of device interchangeability and equipment increases.
With reference now to Fig. 3,, it has described each details according to the BCA 40 of embodiment configuration.As shown in Figure 3, in one embodiment, BCA 40 can comprise have corresponding as indicated source (" S "), grid (" G ") and leak the field effect transistor (" FET ") 50 of (" D ").In the present embodiment, be connected to negative polarity laser bias signal line 33 via one of connecting line 46 in the drain electrode work of FET 50, and be connected to LDCCOMP line 44 via another connecting line 46 in the grid work.The FET source electrode is connected to ground.In this configuration, FET 50 is as voltage-controlled current source.Note, although one type field effect transistor has been shown among Fig. 3, other field-effect transistor types also can be used as BCA 40, so that as previously discussed, outside the internal bias electric current that provides by LDPA 20, be provided for the voltage-controlled current source of laser instrument 28.
Similar but do not have the transceiver of FET 50 to produce the laser bias current of about 16 milliamperes (" mA ") being used for short wave applications and the modulating current of about 16mA usually with the transceiver 10 shown in Fig. 1 and 2, laser bias current is provided by LDPA 20.For long wave applications (for example, 1310 nanometers), suppose it is being under the typical Low ESR situation for the long wave edge emitter laser, same transceiver can produce the laser bias of about 30mA and the modulating current of about 30mA.As shown in Figure 2 in transceiver, comprise FET 50 or other suitable BCA 40 at long wave applications, laser bias current can be amplified to about 60mA, it is enough to be used in the longwave optical emission rate of 1 Gbit/s with the 30mA modulating current.Ethernet reaches about 2 Gbit/s.
Compare with shortwave, vertical cavity laser, this higher bias requirement of long wave edge emitter laser to a great extent root in to those devices being typical high threshold electric current more.As example, the laser instrument of typical 1310nm Fabry-Perot type can have the threshold current of 25mA when 85C.For keeping the 1Gb/s signal when the 85C, may need~modulating current of 20mA.When using the AC coupled system, it causes in the life-span bias current of 25+ (20/2) when initial or 35mA.For edge emitter laser, the life-span is generally defined as working current (or biasing) increases by 50%, so bias current needs 52.5mA can be provided.
Notice that the transceiver 10 of Fig. 1 does not comprise the controller based on processor that is used to diagnose with other function, so that reduce manufacturing cost.Yet if desired, sort controller also can be used in this transceiver.In addition, in one embodiment, LDPA 20 can comprise and is configured to circuit that the signal that is sent to BCA 40 via LDCCOMP line 44 is indirectly adjusted, so that control will offer the amount of the additional bias current of laser instrument 28.
With reference now to Fig. 4,, it has described another example that conduct according to an embodiment is used for the BCA 40 of device that laser bias current is amplified.In this embodiment, comprise bipolar transistor 54 and can operate the resistor 56 that is used to be attached as the BCA 40 of multiplying arrangement, as shown in Figure 2.As indicated, bipolar transistor 54 comprises base stage (" B "), collector (" C ") and emitter (" E ").Can be connected to negative polarity laser bias signal line 33 via one of connecting line 46 in the collector work of bipolar transistor 54, and be connected to LDCCOMP line 44 via another connecting line 46 in the base stage work.Emitter is connected to ground.In addition, be connected to connecting line 46 in resistor 56 work, this connecting line extends between the base stage of LDCCOMP line 44 and bipolar transistor 54.Notice that although Fig. 3 shows a kind of bipolar transistor, other bi-polar transistor types also can be used to provide the Flow Control current source as BCA 40.
Bi-polar transistor arrangement as the BCA 40 of Fig. 2 resembles FET 50, is configured to outside the electric current that is provided by LDPA20, and the laser instrument 28 of bias current to TOSA 16 is provided.Particularly, resistor 52 is provided so that from the voltage that is provided by LDCCOMP line 44 and produces electric current, this electric current is received by bipolar transistor 50 then, and is used to produce amplified current, and this amplified current is forwarded via connecting line 46/ laser bias signal line 33 for laser instrument 28 and uses.In this way, bipolar transistor as the Flow Control current flow devices to provide additional bias current to laser instrument 28.This FET 40 with Fig. 1 is opposite, and FET 40 is as voltage-controlled current source.
With reference now to Fig. 5.In one embodiment, buffer amplifier 60 is provided with along the LDCCOMP output of LDPA 20 with as the connecting line between the BCA 40 of multiplying arrangement 46.Through being provided with like this, buffer amplifier 60 is used for will changing over from the voltage level of LDCCOMP LDPA output in case of necessity being enough to drive FET, bipolar transistor or needed level of other suitable BCA or signal type.Notice that buffer amplifier 60 can be current amplifier or voltage amplifier, this depends on the concrete configuration of BCA 40.Amplifier 60 also makes BCA 40 can be set at " the high side " of laser instrument 28.Buffer amplifier can be any suitable voltage amplifier that is used in usually in the IC circuit.
With reference now to Fig. 6.In an alternative embodiment, BCA can be used as the independent source of the bias current that is used for laser instrument.Fig. 6 shows this configuration, and wherein BCA 140 is shown as on the PCB 11 that is arranged on transceiver 10.LDPA 20 does not comprise the internal circuit that is used to produce laser bias current, and does not similarly comprise the laser bias current signal wire.What replace is, BCA 140 is configured to produce laser bias at positive polarity laser bias current signal wire 132 and negative polarity laser bias current signal wire 133 on both, described two signal wires 132 and 133 each be connected to laser instrument 28 on all working.In this configuration, the whole bias currents that are used for laser instrument 28 are produced by BCA, and this BCA can be made of such as FET one or more transistors.If desired, the operation of BCA 140 still can be controlled via control line 142 by LDPA 20.Notice that if desired, BCA as described herein can only provide bias current to the individual signals line.In addition, in other embodiments, can specify or input automatically by user selection ground from the laser bias current of the proportional amount of LDPA and BCA, so that offer laser instrument.
Under the situation that does not deviate from spirit of the present invention or essential characteristics, the present invention can embody with other particular form.Described embodiment in every respect only as an illustration and unrestrictedly consider.Therefore, scope of the present invention is by claims but not indicated by the description of front.Meaning and all changes in the scope in the equivalents of described claim all are included in the scope of described claim.

Claims (26)

1. optical transceiver module comprises:
Light-emitter assembly comprises the laser instrument that can produce light signal;
Laser driver comprises first bias current sources, and this first bias current sources provides bias current to described laser instrument, so that produce described light signal; And
With the device that described laser driver separates, be used to amplify the described bias current that offers described laser instrument by described first bias current sources.
2. optical transceiver module as claimed in claim 1, the wherein said device that is used to amplify is parallel-connected to described first bias current sources.
3. optical transceiver module as claimed in claim 1, the wherein said device that is used to amplify are connected across two pins of described laser driver.
4. optical transceiver module as claimed in claim 1, the wherein said device that is used to amplify is arranged on second bias current sources of laser driver outside.
5. optical transceiver module as claimed in claim 1, the wherein said device that is used to amplify is arranged on printed circuit board.
6. optical transceiver module as claimed in claim 1, the wherein said device that is used to amplify is an integrated circuit.
7. optical transceiver module as claimed in claim 1, the wherein said device that is used to amplify is a voltage-controlled current source.
8. optical transmitting set comprises:
Light source;
Driver comprises the internal circuit of first bias current to described light source is provided; And
Bias current amplifier, its amplification offer described first bias current of described light source.
9. optical transmitting set as claimed in claim 8, wherein said first bias current is exaggerated by second bias current, and this second bias current is in the outside generation of described driver.
10. optical transmitting set as claimed in claim 9, wherein said first and second bias currents merge before being received by described light source.
Be used for longwave optical emitted laser device 11. optical transmitting set as claimed in claim 1, wherein said light source are configurations, and wherein said driver is that configuration is used for shortwave or longwave optical emitted laser driver.
12. optical transmitting set as claimed in claim 11, wherein said bias current amplifier and described laser driver are arranged on the printed circuit board that is in substantially in the described optical transmitting set body, and are connected to described driver in the work of wherein said bias current amplifier and are controlled by this driver.
13. optical transmitting set as claimed in claim 12 is connected with the LDBIAS pin and the LDCCOMP pin of described laser driver in the work of wherein said bias current amplifier.
14. optical transmitting set as claimed in claim 8, wherein said bias current amplifier is a bipolar transistor.
15. a configuration is used for the photoemissive optical transceiver module of long wave, comprising:
Light-emitter assembly, it is coupled to optical fiber and comprises laser instrument;
Optical receiver assembly, it is coupled to optical fiber; And
Printed circuit board, it comprises:
Laser driver/the post amplifier that merges, it comprises to described laser instrument provides biasing
The circuit of electric current; And
Field effect transistor is connected to described laser driver/post amplifier in its work,
And be configured to provide additional bias current to described laser diode.
16. optical transceiver module as claimed in claim 15, wherein, described field effect transistor with provide the described laser driver/post amplifier circuit of described bias current to be connected in parallel.
17. optical transceiver module as claimed in claim 16 wherein, is connected to the bias loop control circuit of described laser driver/post amplifier in the grid part work of described field effect transistor.
18. optical transceiver module as claimed in claim 17, wherein, the drain portion of described field effect transistor is divided the LDBIAS that is connected to described laser driver/post amplifier in the work pin, and wherein, is connected to ground in the source electrode portion work of described field effect transistor.
19. optical transceiver module as claimed in claim 18, wherein, described optical transceiver module is configured to have the SFP module of at least 1 gigabit/sec data transfer rate.
20. optical transceiver module as claimed in claim 19, wherein, described bias current and described additional bias current provide on the common path between the distance of at least a portion between described laser driver/post amplifier and the described laser instrument.
21. optical transceiver module as claimed in claim 20 also comprises the buffer amplifier that is arranged between described bias loop control circuit and the described field effect transistor.
22. optical transceiver module as claimed in claim 21, wherein, described laser driver/post amplifier comprises control circuit, to regulate the operation of described field effect transistor.
23. optical transceiver module as claimed in claim 22, wherein, the described bias current that is provided by described laser driver/post amplifier comprises positive polarity bias current part and negative polarity bias current part, and wherein said field effect transistor is increased to described negative polarity bias current part with described additional bias current.
24. a configuration is used for the photoemissive optical transceiver module of long wave, comprising:
Light-emitter assembly, it is coupled to optical fiber and comprises laser instrument;
Optical receiver assembly, it is coupled to optical fiber; And
Printed circuit board, it comprises:
Laser driver/the post amplifier that merges, it provides modulating current to described laser instrument;
And
The bias current amplifier, it separates with described laser driver/post amplifier, and described bias current amplifier is configured to provide bias current completely to described laser diode.
25. optical transceiver module as claimed in claim 24, wherein said bias current amplifier comprises transistor.
26. optical transceiver module as claimed in claim 24 is connected to described laser driver/post amplifier in the work of wherein said bias current amplifier, makes the small part that is operated to of described current amplifier be controlled by described laser driver/post amplifier.
CNA200680023816XA 2005-06-28 2006-06-28 Gigabit Ethernet longwave optical transceiver module having amplified bias current Pending CN101213479A (en)

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US60/694,624 2005-06-28
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Cited By (2)

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CN102156334A (en) * 2010-02-04 2011-08-17 康宁光缆系统有限公司 Optical interface cards, assemblies, and related methods, suited for installation and use in antenna system equipment
CN102496614A (en) * 2011-11-25 2012-06-13 深圳市易飞扬通信技术有限公司 Packaging structure and packaging method of collimated light device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102156334A (en) * 2010-02-04 2011-08-17 康宁光缆系统有限公司 Optical interface cards, assemblies, and related methods, suited for installation and use in antenna system equipment
CN102156334B (en) * 2010-02-04 2015-08-26 康宁光缆系统有限公司 Be adapted at optical interface card, assembly and the relevant method installing in antenna system equipment and use
CN102496614A (en) * 2011-11-25 2012-06-13 深圳市易飞扬通信技术有限公司 Packaging structure and packaging method of collimated light device

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